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Finding the Fourth Proportional to 722,103.20, 996,533.56 and 399,813.28

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Solution

The fourth proportional to 722,103.20, 996,533.56 and 399,813.28 is: 551,759.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,103.20 : 996,533.56 = 399,813.28 : x
  2. Step 2: Convert to fraction form
    722,103.20/996,533.56 = 399,813.28/x
  3. Step 3: Cross multiply
    722,103.20x = 996,533.56 × 399,813.28
  4. Step 4: Simplify right side
    722,103.20x = 398,427,351,253.68
  5. Step 5: Solve for x
    x = 398,427,351,253.68/722,103.20
  6. Step 6: Final answer
    x = 551,759.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.